WO2003083306A1 - Internal gear pump with recesses on the gear bearing surfaces - Google Patents
Internal gear pump with recesses on the gear bearing surfaces Download PDFInfo
- Publication number
- WO2003083306A1 WO2003083306A1 PCT/IB2003/001233 IB0301233W WO03083306A1 WO 2003083306 A1 WO2003083306 A1 WO 2003083306A1 IB 0301233 W IB0301233 W IB 0301233W WO 03083306 A1 WO03083306 A1 WO 03083306A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- peripheral
- positive
- displacement pump
- curved surface
- rotor
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/02—Arrangements of bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/001—Pumps for particular liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
Definitions
- the present invention relates to improvements to a rotary positive-displacement pump for fluid products.
- the invention has been developed with particular but not exclusive regard to a pump for use in machines for dispensing colouring agents for the production of paints, varnishes, inks and the like.
- Positive-displacement pumps of the rotary type having internal gears are known.
- One of these pumps is illustrated in Figure 1 appended to the present description and is the subject of patent IT-1292625 belonging to the same applicant, the content of which is regarded as incorporated by reference in the present description.
- the known pump illustrated comprises a rotor 13 mounted on the end of a main shaft 12.
- the rotor 13 has peripheral teeth 15 that can mesh with teeth 16 of an idle sprocket 17 which is supported in rotation by a pin 18 of a conveying body 19.
- the present invention relates to a positive- displacement pump having the characteristics indicated in the claims which follow.
- FIG. 1 shows a pump arrangement of the prior art, as discussed above,
- FIG. 2 is a front view of an idle sprocket of a pump according to the present invention, which sprocket is mounted on the associated support pin, and
- FIGS. 3 and 4 are perspective representations, on an enlarged scale, of two alternative embodiments of a rotor of a pump according to the present invention.
- an idle sprocket 20 which is to be mounted in rotary positive-displacement pumps of a generally known type illustrated by way of example in Figure 1, comprises a body 21 from which a plurality of teeth 22 extend radially.
- the idle sprocket 20 has a central opening 23 in which, in use, the pin 18 of the conveying body 19 is accommodated.
- the central opening 23 has a series of centring portions 25 which are in the shape of an arc of a circle with a centre 0, coinciding with the centre of the pin 18.
- Interposed between the curved centring portions 25 are undercut portions 26 at the location of which the internal wall of the central opening 23 of the idle sprocket 20 is spaced from the peripheral cylindrical portion of the pin 18.
- the central opening 23 comprises three centring portions 25 alternating with as many undercut portions 26, but the number and location of the above-mentioned portions of the central opening 23 can of course vary in accordance with the specific requirements of use of the positive-displacement pump and the particular fluid to be treated.
- FIG. 3 illustrates an embodiment of a rotor 30 for a positive-displacement pump according to the present invention.
- the rotor 30 has a cylindrical peripheral curved surface 31 which has first peripheral notches 32 defining a plurality of peripheral teeth 33 which can mesh with the teeth 22 of the idle sprocket 20.
- the outer face of each peripheral tooth 33 has, between two adjacent peripheral notches 32, depressions 34 which help to reduce the surface area of the peripheral curved surface 31 of the rotor 30 which, in use, is coupled without interference in the corresponding cylindrical cavity 11a provided in the body 11 of the positive-displacement pump.
- Other depressions 36 are provided for the same reason on the peripheral curved surface 31, in a position aligned longitudinally with the peripheral notches 32.
- Figure 4 illustrates a variant of the rotor 30 in which, in addition to the depressions 34 formed on the outer face of each peripheral tooth 33, an annular depression or chamfer 35 may be provided on a portion of the peripheral curved surface 31 remote from the peripheral teeth 33, again for the purpose of reducing the surface area of the peripheral curved surface 31 coupled in rotation without interference to the corresponding cavity 11a provided in the body 11 of the positive-displacement pump.
- the rotor 30 is operated in rotation by the shaft 12 and rotates accommodated inside the corresponding cylindrical cavity 11a, provided in the body 11 of the pump, on which the peripheral curved surface 31 is centred.
- the size of the cylindrical regions of the peripheral curved surface 31 that are not affected by the depressions 34, 36 and/or by the chamfer 35 is sufficient to maintain a good centring of the rotor inside the pump body.
- the depressions 34 appear also to help to break any film which might form inside the fluid product, in particular the colouring product in use .
- peripheral teeth 33 of the rotor 30 mesh, as is known, with the teeth 22 of the idle sprocket 20, driving the latter in rotation about the pin 18.
- the curved centring portions 25 of the central opening 23 are sufficient to maintain the correct centring of the idle sprocket 20 on the pin 18, while the curved undercut portions 26, in addition to reducing the surface area of the idle sprocket 20 in contact with the pin 18, appear to help to break or prevent the formation of a film inside the fluid product in use .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003215844A AU2003215844A1 (en) | 2002-03-29 | 2003-03-28 | Internal gear pump with recesses on the gear bearing surfaces |
EP03745379A EP1495229B1 (en) | 2002-03-29 | 2003-03-28 | Internal gear pump with recesses on the gear bearing surfaces |
US10/509,625 US7048524B2 (en) | 2002-03-29 | 2003-03-28 | Internal gear pump with recesses on the gear bearing surfaces |
DE60305474T DE60305474T2 (en) | 2002-03-29 | 2003-03-28 | INTERNAL GEAR PUMP WITH SPACERS ON THE GEAR WHEEL BEARINGS |
US11/381,276 US7241122B2 (en) | 2002-03-29 | 2006-05-02 | Internal gear pump with recesses on the gear bearing surfaces |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2002BO000167A ITBO20020167A1 (en) | 2002-03-29 | 2002-03-29 | REFINEMENTS IN A ROTARY VOLUMETRIC PUMP FOR FLUID PRODUCTS |
ITBO2002A000167 | 2002-03-29 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10509625 A-371-Of-International | 2003-03-28 | ||
US11/381,276 Continuation US7241122B2 (en) | 2002-03-29 | 2006-05-02 | Internal gear pump with recesses on the gear bearing surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003083306A1 true WO2003083306A1 (en) | 2003-10-09 |
Family
ID=11440013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2003/001233 WO2003083306A1 (en) | 2002-03-29 | 2003-03-28 | Internal gear pump with recesses on the gear bearing surfaces |
Country Status (8)
Country | Link |
---|---|
US (2) | US7048524B2 (en) |
EP (2) | EP1495229B1 (en) |
AT (2) | ATE327435T1 (en) |
AU (1) | AU2003215844A1 (en) |
DE (2) | DE60305474T2 (en) |
ES (2) | ES2268395T3 (en) |
IT (1) | ITBO20020167A1 (en) |
WO (1) | WO2003083306A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7185789B2 (en) | 2004-02-27 | 2007-03-06 | Lenteq, Lp | Hair dye dispenser |
US7654416B2 (en) | 2004-02-27 | 2010-02-02 | Stibbe Management Bv | Fluid and hair-dye dispensers |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITBO20020167A1 (en) * | 2002-03-29 | 2003-09-29 | Corob Spa | REFINEMENTS IN A ROTARY VOLUMETRIC PUMP FOR FLUID PRODUCTS |
EP2182216B1 (en) * | 2007-08-07 | 2017-06-14 | Daikin Industries, Ltd. | Single-screw compressor |
ES2609279T3 (en) * | 2007-08-07 | 2017-04-19 | Daikin Industries, Ltd. | Single screw compressor, and screw rotor machining method |
DE102012221947A1 (en) * | 2012-11-30 | 2014-06-05 | Robert Bosch Gmbh | External gear machine e.g. pump has bearing bushes that are made to correspond with receiving recesses of the housing, and gears that are formed at junctions of supplement circles on front sides of radially surrounding chamfer |
DE102014204982A1 (en) * | 2014-03-18 | 2015-09-24 | Bayerische Motoren Werke Aktiengesellschaft | Hydraulic vehicle vibration damper with a rotary piston machine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1802561U (en) * | 1957-05-23 | 1959-12-17 | Bosch Gmbh Robert | GEAR PUMP OR MOTOR. |
US3331258A (en) * | 1964-02-17 | 1967-07-18 | Eckerle | Rotor for an internally operating geared pump |
FR2562959A1 (en) * | 1984-04-17 | 1985-10-18 | Hydro Fluid | Hydraulic pump with internal gearing |
EP0555173A1 (en) * | 1992-02-03 | 1993-08-11 | A/S De Smithske | A pump |
EP0696679A1 (en) * | 1994-07-16 | 1996-02-14 | ABBPATENT GmbH | Gear pump for the delivery of lacquer |
JPH11247766A (en) * | 1998-02-27 | 1999-09-14 | Mikuni Adec Corp | Trochoid pump |
US6062836A (en) * | 1997-01-16 | 2000-05-16 | Agfa-Gavaert N.V. | Gear pump |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3374748A (en) * | 1966-05-27 | 1968-03-26 | Viking Pump Company | Pump |
US3887310A (en) * | 1973-07-02 | 1975-06-03 | Karol Gerber | Hydraulic pump/motor with hydrostatically balanced rotors |
JPH03202686A (en) * | 1989-12-28 | 1991-09-04 | Aisin Aw Co Ltd | Gear pump |
DE4021500C3 (en) * | 1990-07-05 | 1998-10-22 | Mannesmann Vdo Ag | Delivery unit, in particular for delivering fuel |
IT1292625B1 (en) | 1997-06-16 | 1999-02-08 | Corob Spa | Volumetric pump with dynamic recovery of any axial play, specifically for use in fluid dispensing machines. |
DE29810548U1 (en) * | 1998-06-16 | 1998-12-17 | Joma-Polytec GmbH, 72411 Bodelshausen | Gear for a gear pump |
US6149415A (en) * | 1999-02-11 | 2000-11-21 | Viking Pump, Inc. | Internal gear pump having a feed groove aligned with the roots of the idler teeth |
JP2002257052A (en) * | 2001-03-05 | 2002-09-11 | Denso Corp | Trochoid gear pump |
ITBO20020167A1 (en) * | 2002-03-29 | 2003-09-29 | Corob Spa | REFINEMENTS IN A ROTARY VOLUMETRIC PUMP FOR FLUID PRODUCTS |
-
2002
- 2002-03-29 IT IT2002BO000167A patent/ITBO20020167A1/en unknown
-
2003
- 2003-03-28 AT AT03745379T patent/ATE327435T1/en not_active IP Right Cessation
- 2003-03-28 EP EP03745379A patent/EP1495229B1/en not_active Expired - Lifetime
- 2003-03-28 DE DE60305474T patent/DE60305474T2/en not_active Expired - Lifetime
- 2003-03-28 US US10/509,625 patent/US7048524B2/en not_active Expired - Lifetime
- 2003-03-28 AU AU2003215844A patent/AU2003215844A1/en not_active Abandoned
- 2003-03-28 AT AT06100318T patent/ATE366875T1/en not_active IP Right Cessation
- 2003-03-28 ES ES03745379T patent/ES2268395T3/en not_active Expired - Lifetime
- 2003-03-28 WO PCT/IB2003/001233 patent/WO2003083306A1/en not_active Application Discontinuation
- 2003-03-28 ES ES06100318T patent/ES2290939T3/en not_active Expired - Lifetime
- 2003-03-28 DE DE60314919T patent/DE60314919T2/en not_active Expired - Lifetime
- 2003-03-28 EP EP06100318A patent/EP1659290B1/en not_active Expired - Lifetime
-
2006
- 2006-05-02 US US11/381,276 patent/US7241122B2/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1802561U (en) * | 1957-05-23 | 1959-12-17 | Bosch Gmbh Robert | GEAR PUMP OR MOTOR. |
US3331258A (en) * | 1964-02-17 | 1967-07-18 | Eckerle | Rotor for an internally operating geared pump |
FR2562959A1 (en) * | 1984-04-17 | 1985-10-18 | Hydro Fluid | Hydraulic pump with internal gearing |
EP0555173A1 (en) * | 1992-02-03 | 1993-08-11 | A/S De Smithske | A pump |
EP0696679A1 (en) * | 1994-07-16 | 1996-02-14 | ABBPATENT GmbH | Gear pump for the delivery of lacquer |
US6062836A (en) * | 1997-01-16 | 2000-05-16 | Agfa-Gavaert N.V. | Gear pump |
JPH11247766A (en) * | 1998-02-27 | 1999-09-14 | Mikuni Adec Corp | Trochoid pump |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 14 22 December 1999 (1999-12-22) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7185789B2 (en) | 2004-02-27 | 2007-03-06 | Lenteq, Lp | Hair dye dispenser |
US7597217B2 (en) | 2004-02-27 | 2009-10-06 | Lenteq, Lp | Two disc valve pump assembly for a fluid dispenser |
US7654416B2 (en) | 2004-02-27 | 2010-02-02 | Stibbe Management Bv | Fluid and hair-dye dispensers |
Also Published As
Publication number | Publication date |
---|---|
EP1659290A2 (en) | 2006-05-24 |
US7048524B2 (en) | 2006-05-23 |
ES2268395T3 (en) | 2007-03-16 |
ITBO20020167A0 (en) | 2002-03-29 |
EP1659290A3 (en) | 2006-07-26 |
DE60314919D1 (en) | 2007-08-23 |
EP1659290B1 (en) | 2007-07-11 |
ATE327435T1 (en) | 2006-06-15 |
DE60314919T2 (en) | 2008-03-20 |
ITBO20020167A1 (en) | 2003-09-29 |
DE60305474D1 (en) | 2006-06-29 |
EP1495229A1 (en) | 2005-01-12 |
AU2003215844A1 (en) | 2003-10-13 |
US7241122B2 (en) | 2007-07-10 |
US20050152803A1 (en) | 2005-07-14 |
ATE366875T1 (en) | 2007-08-15 |
EP1495229B1 (en) | 2006-05-24 |
ES2290939T3 (en) | 2008-02-16 |
US20060216188A1 (en) | 2006-09-28 |
DE60305474T2 (en) | 2007-05-03 |
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